C Primer Plus, Fourth Edition

General Utilities: stdlib.h

The ANSI C standard library includes a variety of utility functions defined in stdlib.. The header file defines the types shown in Table RS.V.31.

Table RS.V.31. Types Defined in stdlib.h

Type	Description
size_t	The integer type returned by the sizeof operator.
wchar_t	The integer type used to represent wide characters.
div_t	The structure type returned by div(); it has a quot and a rem member, both of type int.
ldiv_t	The structure type returned by ldiv(); it has a quot and a rem member, both of type long.
lldiv_t	The structure type returned by lldiv(); it has a quot and a rem member, both of type long long. (C99)

The header file defines the constants listed in Table RS.V.32.

Table RS.V.32. Constants Defined in stdlib.h ...